Answer:
Grease is insoluble in water but soluble in kerosene
Explanation:
The molecules in grease are non polar molecules and so can not react with water which is polar to generate enough solvation energy. On the other hand kerosine is non polar so reacts with grease to generate enough solvation energy to dissolve it.
It is a shell structure.
Hope this helps :)
No boiling water is not a chemical change it would be a physical change
Answer:
15.38 g is the mass for M in the 329 g of sample
Explanation:
Mineral's formula: MS
Our sample weighs 44.9 g
Mass of M: 2.1 g
Our new sample weighs 329 g
We may solve this by a rule of three:
44.9 g of sample contain 2.1 g of M
329 g of sample will contain (329 . 2.1) / 44.9 = 15.38 g